Bad children. Zi Jingchen

The perfect crime. One fine morning, a mathematics teacher Zhang Dunshin encounters his rich relatives from the observation deck of the Sanminhan National Park. Everything is calculated to the smallest detail. The police considered this an accident.

close people. Zhu Chaoyan is the best student of the school. Due to the craving for the knowledge of Zhu infinitely lonely. Everything changes when a childhood friend unexpectedly returns to his life - Dean Hao with his named sister Baulus. They fled from the shelter for children whose parents were convicted of murder, and now desperately need money.

blackmail. Walking in the park, the teenagers accidentally filmed the murder committed by Zhang on the camera. And now they invite the killer to redeem compromises, ready for anything, just to achieve their goal. But Zhang does not intend to dance to someone else's pipe. And then darkness begins...